【作者】 李永军； 张奎； 李兴刚； 赵欣； 张凯；

【Author】 Li Yongjun Zhang Kui Li Xinggang Zhao Xin Zhang Kai (State Key Lab for Fabrication & Processing of Non-ferrous Metals,Beijing General Research Institute for Non-ferrous Metals,Beijing 100088,China)

【机构】 北京有色金属研究总院有色金属材料制备加工国家重点实验室；

【摘要】 本文对 Mg-Y-Nd-Zr 合金铸锭在不同温度和时间下进行均匀化处理,采用金相显微镜、X-Ray 衍射和扫描电镜及能谱分析仪对合金不同状态下的微观组织和成分进行观察分析。结果表明,合金组织中的中间相主要由灰色条块状的 Mg₂₄Y₅相和黑色点状的 Mg₁₂Nd 相组成;经过 530℃×36h 或547℃×6h 处理后,合金中的含 Y 相基本完全分解并熔入基体中,而含 Nd 相分别在530℃和547℃经过不同时间的处理后,其分布状态基本保持不变;547℃×6h 可以作为 Mg-Y-Nd-Zr 合金制定均匀化处理工艺的参照.更多还原

【Abstract】 In this paper,the experiments of uniform heat treatment at different temperature and time were carried out on the ingots of Mg-Y-Nd-Zr alloy. Optical microscopy,X-ray diffraction(XRD), scanning electron microscope(SEM)and energy spectrum analyzer(EDS)were used to observe and analysis the microstructure and the ingredient of interphases.The results indicated that the interphases in the alloy mainly were Mg24Y5 phase as gray strips in shape and Mgl2Nd phase as black point in shape;After 530℃×36h or 547℃×6h treatment,the phases which mainly contain Y element mostly decomposed into the matrix,while the phases which mainly contain Nd element still kept the distribution unchanged;For Mg-Y-Nd-Zr alloys,547℃×6h can be a reference when the system of uniform heat treatment was designed.更多还原